to take one's leave soonA polite, indirect way to say that it is about time to leave. The exact term is in plain form; in natural polite conversation, it is commonly inflected as そろそろ失礼します.
JA: 楽しかったです。それでは、そろそろ失礼することにします。
EN: I had a great time. Well, I think I should be going now.